NFSv4: ACL in operations 'open' and 'create' should be used

ACL in operations 'open' and 'create' is decoded but never be used.
It should be set as the initial ACL for the object according to RFC3530.
If error occurs when setting the ACL, just clear the ACL bit in the
returned attr bitmap.
Signed-off-by: NYu Zhiguo <yuzg@cn.fujitsu.com>
Signed-off-by: NJ. Bruce Fields <bfields@citi.umich.edu>

fs/nfsd/nfs4proc.c

@@ -123,6 +123,35 @@ nfsd4_check_open_attributes(struct svc_rqst *rqstp,
 	return status;
 }
 
+static int
+is_create_with_attrs(struct nfsd4_open *open)
+{
+	return open->op_create == NFS4_OPEN_CREATE
+		&& (open->op_createmode == NFS4_CREATE_UNCHECKED
+		    || open->op_createmode == NFS4_CREATE_GUARDED
+		    || open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1);
+}
+
+/*
+ * if error occurs when setting the acl, just clear the acl bit
+ * in the returned attr bitmap.
+ */
+static void
+do_set_nfs4_acl(struct svc_rqst *rqstp, struct svc_fh *fhp,
+		struct nfs4_acl *acl, u32 *bmval)
+{
+	__be32 status;
+
+	status = nfsd4_set_nfs4_acl(rqstp, fhp, acl);
+	if (status)
+		/*
+		 * We should probably fail the whole open at this point,
+		 * but we've already created the file, so it's too late;
+		 * So this seems the least of evils:
+		 */
+		bmval[0] &= ~FATTR4_WORD0_ACL;
+}
+
 static inline void
 fh_dup2(struct svc_fh *dst, struct svc_fh *src)
 {
@@ -206,6 +235,9 @@ do_open_lookup(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_o
 	if (status)
 		goto out;
 
+	if (is_create_with_attrs(open) && open->op_acl != NULL)
+		do_set_nfs4_acl(rqstp, &resfh, open->op_acl, open->op_bmval);
+
 	set_change_info(&open->op_cinfo, current_fh);
 	fh_dup2(current_fh, &resfh);
 
@@ -536,12 +568,17 @@ nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 		status = nfserr_badtype;
 	}
 
-	if (!status) {
+	if (status)
+		goto out;
+
+	if (create->cr_acl != NULL)
+		do_set_nfs4_acl(rqstp, &resfh, create->cr_acl,
+				create->cr_bmval);
+
 	fh_unlock(&cstate->current_fh);
 	set_change_info(&create->cr_cinfo, &cstate->current_fh);
 	fh_dup2(&cstate->current_fh, &resfh);
-	}
-
+out:
 	fh_put(&resfh);
 	return status;
 }